Alarm clock



Aug. 31, 1937. M. SCHLENKER ALARM CLOCK Filed Aug. 1, 1936 2 Slants-Sheet 1 FIG.

Mm sah'i i Aug. 31, 1937. M CHLEN E 2,091,170

ALARI CLOCK Filed Aug. 1, 19:55 2 Shae ts-Sho et '2 FIG. 5

IN VEN TOR.

Patented Aug. 31, '1937 UNITED STATES PATENT OFFICE ALARM CLOCK Max Schlenker, La Salle, Iii. Application August 1, 1938, Serial No. 93,795

6 Claims.

My invention relates generally to electrically operated alarm clocks, and more particularly to an improved indicator means with mechanism for setting and operating the alarm mechanism In this type of clock as well as in the regular spring driven type of clocks.

It has for its object the production of such an alarm indicating means in which each of the indicating parts therein associated is easily and m readily distinguished in and by itself but more especially more visible, distinct and easily read when the parts are assembled and associated with each other. In addition to being thus more easily read the parts are extremely simple, in-

expensive to produce and readily and easily assembled. When assembled the combined parts constitute an indicating means that is capable of very close adjustment and of very great accuracy in setting the time when the alarm shall sound.

I accomplish these objects by the means shown in the accompanying drawings in which:

Fig. 1 is a rear view of the clock movement.

Fig. 2 is a. right side view of the same, the bell and its bracket being omitted.

Fig. 3 is a partial rear view of said movement showing the alarm mechanism. 1

Fig. 4 is a partial right side view of the same.

Fig. 5 is a sectional view of the alarm setting so and tripping mechanism.

Fig. 6 is an axial view of the same.

Similar numerals represent the same parts throughout the several views.

In the drawings I represents the front frame i5 plate and 2 the rear frame plate of the clock. Said frame plates I and 2 are mounted on and held in proper position by the pillars 2 and the pillar nuts 4.

Adjacent to, and on the inner side of said frame plate I, are attached the stator plates 5 and 6 of the synchronous motor shown that drives the hands of the clock, and on the inner side of said stator plates the auxiliary stator plates 1 and 2.

Journally mounted in frame plates land 2 is the rotor shaft 9, to which is fixed the rotor II and the rotor pinion Ii. Said rotor pinion lI engages gear wheel I2 which is rotatably mounted on the center shaft I2, journally mounted in frame plates I and 2. Integral with said gear wheel I2 is the pinion it which engages intermediate gear wheel I! rotatably mounted on a pin I8, which is fastened in frame plate I. Integral with gear wheel I! is the pinion I1 which 55 engages intermediate gear wheel I2 rotatably 5 and 8, are attached 2 mounted on said center shaft I2. Integral with gear wheel I2 is the pinion I2 which engages interminate gear wheel 22 rotatably mounted on said pin it. Integral with said gear wheel 20 is the pinion 2| which engages gear wheel 22, fric- 5 tionally mounted on said center shaft I2. The rotation of rotor I2 is transmitted to said center shaft l2 in conventional manner, by the train of gears and pinlons above described. Shaft I2 is also manually rotated by means of the knob 10 shown thereon to set the hands of the clock and the disc 21 is also rotated thereby at the same time.

Fixed to said center shaft I2 is the pinion 22 which meshes with the gear wheel 22 rotatably 1 mounted on stud 22 which is fastened in frame plate I. Integral with said gear wheel 24 is the pinion 22 which engages the gear wheel 21 fixed to the shaft 22 which is journally mounted In frame plates I and 2 and has its left end part 20 threaded. On said shaft 22 is rotatably mounted the sleeve 22 to which is affixed the trip cam 22 having lobe 2|. Attached to the forward end of said sleeve 22 (see Fig. 5) is the gear wheel 22, on the front face of which is marked the alarm 25 indicator arrow 22 (see Fig. 6).

Said sleeve 22. which has fastened thereto the trip cam 22 and gear wheel 22, is frictionally rotatable on shaft 22, said friction being supplied by the coiled spring 22 abutting the -stop collar 24 which is mounted on shaft 22, as shown.

Fastened to the forward end of shaft 22 by means of the threads 24a thereon and the nut 25, is the hub 22 through the means of its internal threads as shown. On said hub 22 is fixed the transparent disc 21. On the side of said disc 21 adjacent to the gear wheel 22 is marked the usual alarm dial divisions and numbers, as shown. Friction washer 22 is mounted between gear wheel 22 and the hub 22 so that gear wheel 22 can be manually rotated in relation to disc 21. This transparent disc 21 can be shaped like a lens so that it will magnify or enlarge the divisions and numbers on the side thereof as well as the alarm indicator arrow on gear wheel 22 above mentioned thus making it very easy to see and accurately set the time that the alarm should be sounded by means of the indicator on gear wheel 22 above mentioned.

Journally mounted in frame plate 2 as shown, is the shaft 29, to which is fixed the set pinion 40 and the thumb knob I. Said set pinion 22 engages the gear wheel 22.

Journally mounted in frame plates I and 2 is the shaft 42, to which is fixed the thumb knob 66 44 and the usual gear segment 45, the teeth of which are bent at a slight slant so that they will readily engage the rotor pinion I! and start the rotor rotating by means of the spring 45a V which is tensioned thereby in the usual manner.

Mounted on the sides of the stator plates 5 and 1, on the one side, and plates 6 and 8, on the other side, are the pole pieces 46, 41 and 48, about which is wound the conventional coil 49. Said pole pieces 46, 41 and 48 are fastened to said stator plates, on each side, by the bolts 50 and the nuts 5|, as shown.

At the extremity of pole piece 46 is the projection 52. At the extremity of pole piece is the projection 53, to which is fixed the studs 54. The flexible member 55 is held adjacent to said projection 53 by the coiled springs 56 mounted on said studs 54 as shown. I

Fastened to said flexible member 55 by means of two rivets 51 is the armature 58, so disposed as to hem the magnetic field of said projection 52 of the pole piece 46. At the extremity of member 55 is fastened the hammer 59.

Mounted adjacent to frame plate 2 by means of nut 60 and screw BI is the bracket 62 which carries the bell 63, as shown.

Journally mounted in frame plates '1 and 2 is the shaft 64, to which is fastened the lever 65 having the projections 66, 61, 68 and 69. Said projection is so disposed as to bear on the periphery of trip cam 30 under pressure of the flat spring lllacting on projection 61.

Mounted on frame plate 2, by means of the rivet 1| is the lever member 12 having the projections 13, 14 and 15. The projection 13 serves as a handle for the manual operation of said lever 12, while the projection 14 which contacts- '32 by means of the knurled knob 4| which rotates the pinion 40 meshing with said gear 32 until the indicator on said gear lines up with the proper division on the transparent member 31 which sets the cam 30 in proper position so that the alarm mechanism will operate to sound at the time indicated. From the above description it is evident that my alarm setting means is very simple in operation, very inexpensive to produce and the numbers and divisions thereon readily and'easily seen so that it is capable of very close adjustment with practically no effort on the part of the operator. It will be understood, of course, that while I have here shown one form of my invention,'I do not wish to limit it to the exact form shown, but I desire to have it taken in a sense illustrative of all or anyof the forms that come fairly within the scope of the appended claims.

I claim: 1. In an alarm clock, a. clock movement frame with time keeping means mounted therein including an alarm mechanism, a shaft journaled in said frame rotated by said time keeping means, a cam and gear wheel connected with each other and frictionally mounted on said shaft, an indicating means on said gear wheel, means for manually rotating said gear wheel, a transparent disc having a plurality of co-operative divisions and consecutive numbers thereon fastened on said shaft adjacent to said gear wheel, and alarm releasing means associated with said cam.

2. In an alarm clock, a clock movement frame with time keeping means mounted therein including an alarm mechanism, a shaft journaled in said frame rotated by said time keeping means, a cam and gear wheel connected with each other and frictionally mounted on said shaft, an indicating means on said gear wheel, means for manually rotating said gear wheel, a transparent disc having a plurality of divisions and-consecutive numbers thereon co-operating with said indicating means and a'djustably fastened on said shaft adjacent to said gear wheel, and alarm releasing means associated with said cam.

3. In an alarm clock, a clock movement frame with time keeping means mounted therein including an alarm mechanism, a shaft journaled in said frame rotated by said time keeping means, a sleeve frictionally mounted on said shaft, a cam and a gear wheel fastened on said sleeve, an inmanually rotating said gear wheel, a transparent disc having a plurality of co-operative divisions and consecutive numbers thereon fastened on said shaft adjacent to said gear wheel, and alarm releasing means associated with said cam.

4. In an alarm clock setting means including a time keeping means mounted in a movement frame, a shaft journaled in said frame rotated by said time keeping means, a cam and gear wheel fastened together frictionally mounted on said shaft, an indicating mark on said gear wheel, a transparent disc having a plurality of divisions with consecutive numbers co-operating with said mark fastened on said shaft adjacent to said gear wheel and manual means for rotating said gear wheel.

5. In an alarm setting means,'an alarm mechanism including a shaft rotated in timed relation, a gear wheel and a cam fastened together and frictionally mounted on said shaft, an indicating means on said gear wheel, a transparent disc having a plurality of co-operative indicating divisions and numbers thereon fastened on said shaft adjacent to said gear wheel and means for manually rotating said gear wheel.

6. In an alarm setting means, an alarm mechanism including a shaft rotated in timed relation, a gear wheel and a cam fastened together and frictionally mounted on said shaft, an indieating means on said gear wheel, a transparent fastened on said shaft adjacent to said gear wheel and means for manually rotating said gear wheel.

MAX SCHLENKER. 

